I am glad that you appreciate the efforts I went through to save/help/imprison/kill you and/or your near and dear ones and/or your nemesis.

Know that your letter of appreciation/request for aid/threats will keep me warm in the cold winter nights. And I don’t mean by fussy feelings (though I do not rule out the possibility), but because I will feed them to the fire, lest I am buried beneath the great pile of letters from others like you.